/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #f1f5f9;
    --accent-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --background: #ffffff;
    --surface: #f8fafc;
    --border: #e2e8f0;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-light: #94a3b8;
    --background: #0f172a;
    --surface: #1e293b;
    --border: #334155;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px 0 rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loading-content {
    text-align: center;
    color: white;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top: 3px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Navigation */
.navbar {
    background: var(--background);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition);
    display: none; /* Hidden by default, shown only when authenticated */
}

.navbar.authenticated {
    display: block;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    overflow: hidden;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    flex-shrink: 0;
}

.nav-brand i {
    font-size: 28px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: nowrap;
    overflow: hidden;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    text-decoration: none;
    color: var(--text-secondary);
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-weight: 500;
    white-space: nowrap;
    min-width: fit-content;
    font-size: 14px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background-color: var(--secondary-color);
}

.logout-btn {
    color: var(--danger-color) !important;
}

.logout-btn:hover {
    background-color: rgba(239, 68, 68, 0.1) !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* Main Container */
.main-container {
    margin-top: 70px;
    min-height: calc(100vh - 70px);
}

/* Pages */
.page {
    display: none;
    padding: 40px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.page.active {
    display: block;
}

.page-header {
    margin-bottom: 40px;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* Auth Pages */
.auth-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 70px);
    padding: 20px;
}

.auth-card {
    background: var(--surface);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    padding: 40px;
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border);
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 10px;
}

.auth-logo i {
    font-size: 32px;
    color: var(--primary-color);
}

.auth-logo h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 16px;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    padding-left: 45px;
    border: 2px solid var(--border);
    border-radius: var(--border-radius);
    font-size: 16px;
    background: var(--background);
    color: var(--text-primary);
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    margin-top: 12px;
}

.form-group textarea {
    padding-left: 16px;
    min-height: 100px;
    resize: vertical;
}

.form-group select {
    padding-left: 16px;
}

.auth-footer {
    text-align: center;
    margin-top: 20px;
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    min-height: 48px;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--secondary-color);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--border);
}

[data-theme="dark"] .btn-secondary {
    background: var(--surface);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

[data-theme="dark"] .btn-secondary:hover {
    background: var(--border);
    color: var(--text-primary);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
    min-height: 36px;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Dashboard */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.dashboard-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
}

.dashboard-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    font-size: 24px;
}

.card-content h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.card-content p {
    color: var(--text-secondary);
    font-size: 14px;
}

.recent-activity {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
}

.recent-activity h2 {
    margin-bottom: 20px;
    color: var(--text-primary);
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--background);
    border-radius: var(--border-radius);
    border: 1px solid var(--border);
}

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    color: white;
    font-size: 16px;
}

.activity-content {
    flex: 1;
}

.activity-content h4 {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 2px;
    color: var(--text-primary);
}

.activity-content p {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Generator Page */
.generator-container {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 40px;
    margin-bottom: 40px;
}

.input-section {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

.input-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
}

.tab-btn {
    flex: 1;
    padding: 16px 20px;
    border: none;
    background: var(--background);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 500;
}

.tab-btn.active {
    background: var(--surface);
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
}

.tab-content {
    display: none;
    padding: 24px;
}

.tab-content.active {
    display: block;
}

.file-upload-area {
    border: 2px dashed var(--border);
    border-radius: 12px;
    padding: 40px 20px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.file-upload-area:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

.upload-icon {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.file-upload-area h3 {
    margin-bottom: 8px;
    color: var(--text-primary);
}

.file-upload-area p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.file-info {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: 16px;
}

.file-details {
    display: flex;
    align-items: center;
    gap: 12px;
}

.file-details i {
    font-size: 24px;
    color: var(--danger-color);
}

.file-details h4 {
    font-weight: 500;
    color: var(--text-primary);
}

.file-details p {
    font-size: 14px;
    color: var(--text-secondary);
}

.btn-remove {
    margin-left: auto;
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    transition: var(--transition);
}

.btn-remove:hover {
    color: var(--danger-color);
    background: rgba(239, 68, 68, 0.1);
}

.text-input-area {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.text-input-area label {
    font-weight: 500;
    color: var(--text-primary);
}

.text-input-area textarea {
    min-height: 200px;
    padding: 16px;
    border: 2px solid var(--border);
    border-radius: var(--border-radius);
    background: var(--background);
    color: var(--text-primary);
    resize: vertical;
    font-family: inherit;
}

.text-input-area textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.text-stats {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    color: var(--text-secondary);
}

.settings-section {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    height: fit-content;
}

.settings-section h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
}

.settings-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.setting-group label {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 14px;
}

.setting-group select {
    padding: 10px 12px;
    border: 2px solid var(--border);
    border-radius: var(--border-radius);
    background: var(--background);
    color: var(--text-primary);
    font-size: 14px;
}

.btn-generate {
    width: 100%;
    font-size: 16px;
    font-weight: 600;
}

.generation-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.progress-content {
    background: var(--surface);
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    max-width: 400px;
    width: 90%;
}

.progress-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

/* Questions Page */
.questions-filters {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
    padding: 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    flex-wrap: wrap;
    align-items: end;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-width: 150px;
    flex: 1;
}

.filter-group.search-bar {
    flex: 2;
    max-width: 400px;
}

.filter-group label {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 14px;
}

.filter-group select,
.filter-group input {
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--border-radius);
    background: var(--background);
    color: var(--text-primary);
    font-size: 14px;
    transition: var(--transition);
}

.filter-group select:focus,
.filter-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.filter-group input[type="text"] {
    padding-left: 40px;
}

.questions-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.question-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    transition: var(--transition);
}

.question-card:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.question-meta {
    display: flex;
    gap: 12px;
    align-items: center;
}

.question-badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.badge-easy {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-color);
}

.badge-medium {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.badge-hard {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.question-content {
    margin-bottom: 16px;
}

.question-content h4 {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.question-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.question-actions {
    display: flex;
    gap: 12px;
}

/* Reports Page */
.reports-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
    max-height: calc(100vh - 200px);
    overflow-y: auto;
}

.chart-container {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    height: fit-content;
    max-height: 400px;
}

.chart-container canvas {
    max-height: 300px !important;
}

.chart-container h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
}

.stats-grid {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
}

.stat-card h4 {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 500;
}

.stat-card span {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

/* Profile Page */
.profile-container {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 30px;
}

.profile-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
}

.profile-avatar {
    text-align: center;
    margin-bottom: 24px;
}

.avatar-circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: white;
    font-size: 40px;
}

.profile-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.preferences-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    height: fit-content;
}

.preferences-card h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
}

.preference-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
}

.preference-item:last-child {
    border-bottom: none;
}

.preference-info h4 {
    font-weight: 500;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.preference-info p {
    font-size: 14px;
    color: var(--text-secondary);
}

.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border);
    transition: var(--transition);
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition);
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.data-management {
    grid-column: 1 / -1;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
}

.data-management h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
}

.data-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 3000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--surface);
    border-radius: 12px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 {
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text-light);
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--text-primary);
    background: var(--border);
}

.modal-body {
    padding: 24px;
}

/* Question Modal Content */
.question-modal-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.question-text {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.6;
}

.question-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.option-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.option-item:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

.option-item input {
    margin: 0;
}

.option-item label {
    flex: 1;
    cursor: pointer;
    color: var(--text-primary);
}

.question-actions-modal {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 20px;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 90px;
    right: 20px;
    z-index: 4000;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: 16px 20px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 300px;
    animation: slideIn 0.3s ease;
}

.toast.success {
    border-left: 4px solid var(--accent-color);
}

.toast.error {
    border-left: 4px solid var(--danger-color);
}

.toast.warning {
    border-left: 4px solid var(--warning-color);
}

.toast-icon {
    font-size: 18px;
}

.toast.success .toast-icon {
    color: var(--accent-color);
}

.toast.error .toast-icon {
    color: var(--danger-color);
}

.toast.warning .toast-icon {
    color: var(--warning-color);
}

.toast-content {
    flex: 1;
}

.toast-content h4 {
    font-weight: 500;
    margin-bottom: 2px;
    color: var(--text-primary);
}

.toast-content p {
    font-size: 14px;
    color: var(--text-secondary);
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: var(--transition);
}

.toast-close:hover {
    color: var(--text-primary);
    background: var(--border);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--surface);
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        transition: var(--transition);
        border-top: 1px solid var(--border);
        z-index: 999;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .page {
        padding: 20px 16px;
        margin-top: 70px;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .generator-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .reports-container {
        grid-template-columns: 1fr;
        max-height: calc(100vh - 150px);
    }

    .profile-container {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .questions-filters {
        flex-direction: column;
        gap: 16px;
    }

    .filter-group {
        min-width: auto;
    }

    .data-actions {
        flex-direction: column;
    }

    .modal-content {
        width: 95%;
        margin: 20px;
        max-height: 90vh;
    }

    .toast-container {
        left: 20px;
        right: 20px;
        top: 80px;
    }

    .toast {
        min-width: auto;
    }

    .auth-container {
        padding: 16px;
        min-height: 100vh;
    }

    .auth-card {
        padding: 24px 20px;
        max-width: 100%;
        margin: 0;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 12px;
    }

    .nav-brand span {
        font-size: 18px;
    }

    .auth-card {
        padding: 20px 16px;
    }

    .auth-header h1 {
        font-size: 24px;
    }

    .page {
        padding: 16px 12px;
    }

    .page-header {
        margin-bottom: 20px;
    }

    .page-header h1 {
        font-size: 1.5rem;
        margin-bottom: 8px;
    }

    .page-header p {
        font-size: 14px;
    }

    .dashboard-card {
        padding: 16px;
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }

    .card-icon {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }

    .card-content h3 {
        font-size: 1.25rem;
    }

    .card-content p {
        font-size: 14px;
    }

    .btn {
        padding: 10px 16px;
        font-size: 14px;
        min-height: 44px;
    }

    .form-group input,
    .form-group textarea,
    .form-group select {
        padding: 10px 12px;
        padding-left: 40px;
        font-size: 16px; /* Prevents zoom on iOS */
    }

    .form-group i {
        left: 12px;
    }

    .settings-section {
        padding: 16px;
    }

    .question-card {
        padding: 16px;
    }

    .chart-container {
        padding: 16px;
        max-height: 300px;
    }

    .chart-container canvas {
        max-height: 200px !important;
    }
}

@media (max-width: 375px) {
    .nav-container {
        padding: 0 8px;
    }

    .page {
        padding: 12px 8px;
    }

    .auth-card {
        padding: 16px 12px;
    }

    .dashboard-grid {
        gap: 12px;
    }

    .dashboard-card {
        padding: 12px;
    }

    .modal-content {
        width: 98%;
        margin: 10px;
    }

    .modal-body {
        padding: 16px;
    }

    .toast-container {
        left: 10px;
        right: 10px;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.p-0 { padding: 0; }
.p-1 { padding: 8px; }
.p-2 { padding: 16px; }
.p-3 { padding: 24px; }
.p-4 { padding: 32px; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }
.gap-4 { gap: 32px; }


/* Dark mode specific fixes */
[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group textarea,
[data-theme="dark"] .form-group select {
    background: var(--surface);
    color: var(--text-primary);
    border-color: var(--border);
}

[data-theme="dark"] .setting-group select,
[data-theme="dark"] .filter-group select {
    background: var(--surface);
    color: var(--text-primary);
    border-color: var(--border);
}

[data-theme="dark"] .text-input-area textarea {
    background: var(--surface);
    color: var(--text-primary);
    border-color: var(--border);
}

[data-theme="dark"] .btn-secondary {
    background: var(--surface);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

[data-theme="dark"] .btn-secondary:hover {
    background: var(--border);
    color: var(--text-primary);
}

[data-theme="dark"] .modal-content {
    background: var(--surface);
    color: var(--text-primary);
}

[data-theme="dark"] .option-item {
    background: var(--surface);
    border-color: var(--border);
    color: var(--text-primary);
}

[data-theme="dark"] .option-item:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}


/* /* FAQ Page */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-section {
    margin-bottom: 40px;
}

.faq-section h2 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 24px;
    font-weight: 600;
}

.faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 16px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow);
}

.faq-question {
    padding: 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background: rgba(99, 102, 241, 0.05);
}

.faq-question h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.faq-question i {
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 0 20px 20px;
    max-height: 500px;
}

.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
}

.faq-answer ul {
    margin: 12px 0;
    padding-left: 20px;
}

.faq-answer li {
    color: var(--text-secondary);
    margin-bottom: 8px;
    line-height: 1.5;
}

.faq-answer strong {
    color: var(--text-primary);
    font-weight: 600;
}   line-height: 1.6;
}

.faq-answer strong {
    color: var(--text-primary);
}

/* FAQ Responsive */
@media (max-width: 768px) {
    .faq-container {
        padding: 0 16px;
    }
    
    .faq-question {
        padding: 16px;
    }
    
    .faq-item.active .faq-answer {
        padding: 16px;
    }
    
    .faq-question h3 {
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    .faq-question {
        padding: 12px;
    }
    
    .faq-item.active .faq-answer {
        padding: 12px;
    }
    
    .faq-question h3 {
        font-size: 14px;
    }
}


/* Gamification Styles */
.achievement-notification {
    position: fixed;
    top: 100px;
    right: -400px;
    width: 350px;
    background: linear-gradient(135deg, var(--primary-color), #7c3aed);
    color: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.3);
    transition: all 0.3s ease;
    z-index: 1001;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.achievement-notification.show {
    right: 20px;
}

.achievement-content {
    display: flex;
    align-items: center;
    gap: 16px;
}

.achievement-content i {
    font-size: 32px;
    color: #ffd700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.achievement-text h4 {
    margin: 0 0 4px 0;
    font-size: 16px;
    font-weight: 600;
}

.achievement-text p {
    margin: 0 0 4px 0;
    font-size: 14px;
    opacity: 0.9;
}

.achievement-points {
    color: #ffd700 !important;
    font-weight: 600 !important;
}

.gamification-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.stat-card i {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.stat-card h3 {
    margin: 0 0 8px 0;
    font-size: 24px;
    color: var(--text-primary);
}

.stat-card p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 14px;
}

.level-progress {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 24px;
}

.level-progress h3 {
    margin: 0 0 16px 0;
    color: var(--text-primary);
}

.progress-bar {
    background: var(--border);
    border-radius: 20px;
    height: 12px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    background: linear-gradient(90deg, var(--primary-color), #7c3aed);
    height: 100%;
    border-radius: 20px;
    transition: width 0.3s ease;
}

.progress-text {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-secondary);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.achievement-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
}

.achievement-item.unlocked {
    border-color: var(--success-color);
    background: rgba(34, 197, 94, 0.05);
}

.achievement-item.locked {
    opacity: 0.6;
}

.achievement-item i {
    font-size: 24px;
    width: 40px;
    text-align: center;
}

.achievement-item.unlocked i {
    color: var(--success-color);
}

.achievement-item.locked i {
    color: var(--text-light);
}

.achievement-info h4 {
    margin: 0 0 4px 0;
    font-size: 16px;
    color: var(--text-primary);
}

.achievement-info p {
    margin: 0 0 4px 0;
    font-size: 14px;
    color: var(--text-secondary);
}

.achievement-info .achievement-points {
    font-size: 12px;
    color: var(--primary-color);
    font-weight: 600;
}

/* Gamification Responsive */
@media (max-width: 768px) {
    .achievement-notification {
        width: calc(100% - 40px);
        right: -100%;
    }
    
    .achievement-notification.show {
        right: 20px;
    }
    
    .gamification-stats {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 12px;
    }
    
    .stat-card {
        padding: 16px;
    }
    
    .stat-card i {
        font-size: 24px;
    }
    
    .stat-card h3 {
        font-size: 20px;
    }
    
    .achievements-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .achievement-notification {
        width: calc(100% - 20px);
        padding: 16px;
    }
    
    .achievement-content {
        gap: 12px;
    }
    
    .achievement-content i {
        font-size: 24px;
    }
    
    .gamification-stats {
        grid-template-columns: 1fr 1fr;
    }
    
    .stat-card {
        padding: 12px;
    }
}